Can I bring snacks on the plane when traveling to Thailand?

Sure, but you have to see what it is. If it is a drink, such as mineral water, drinks, it should not be possible. In fact, it is best to fly without eating or drinking, but if you just bring it back for people to eat or eat at home, it should be no problem, depending on the weight you bring. I also travel to Thailand and often bring Thai snacks back to China. I also bring Thai snacks on the plane, not exceeding 1 kg. I recommend Doikham Thai dried fruit (there are many kinds of Doi kham Thai dried fruit, such as dried mango, dried strawberry and dried dragon fruit) and Thai squid slices, because they are not fragile, so it is no problem.